Removable porcelain cap or cusp for dental work



S. A. SIGEL.

REMOVABLE PORCELAIN CAP 0R CUSP FOR DENTAL WORK.

APPLICATION FILED JULY 14. m9.

1,332,415. Patented Mar. 2,1920.

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SIGMUND ALBERT SIGEL, OF CHICAGO, ILLINOIS.

REMOVABLE PORCELAIN CA]? GR CUSP FOR DENTAL WORK.

Application filed July 14, 1919.

To all whom it may concern.-

Be it known that I, SIGMUND ALBERT SIGEL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Removable Porcelain Caps or Cusps for Dental Work, of which the following is a specification.

This invention relates to improvements in removable porcelain cap or cusp for dental work, particularly adapted, though not necessarily limited in its use, for posterior bridge Work, and one of the objects of: the invention is to provide improved means for removably holding or securing the cap or cusp in position and which will at the same time be of a sanitary construction.

A further object is to provide an i1nproved supporting plate and improved means for holding and securing the cap to the plate and which plate will be practically invisible when the cap is viewed from above the same.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating this invention and in which;

Figure 1 is a greatly enlarged view of this invention showing the same in position and when used as a bridge.

Fig. 2 is a verti al sectional view of the parts shown in Fig. 1.

Fig. 3 is a perspective view of the supporting plate with the cap removed.

Fig. 4 is a perspective view of the porcelain cap.

Fig. 5 is a side elevation of the cap.

Fig. 6 is a bottom plan view of the cap.

Referring more particularly to the drawing, the numeral 10 designates generally the supporting plate which may be constructed of any suitable material such as gold, which is generally used in dental work.

This cap may be of any desired size and configuration to accommodate it to the use to which it is to be put. That is to say, if the cap or cusp is to be employed for bridge work, the plate is of a configuration to span the space between adjacent teeth and if it 1s to be used, as a crown, the plate is of a .con-

Specification of Letters Patent.

Patented Mar. 2, 1920.

Serial No. 310,797.

figuration to fit over the tooth to which the crown is to be employed.

In the drawing the invention is shown as adapted for bridge work, but it is to be un-. derstood that it can be used with equal efliciency for other dental work.

The plate 10 is provided with a circumferential upwardly projecting flange 11 and when employed as a bridge is adapted to be secured in any suitable manner such as by means of solder 12 to the crowns 13, of adjacent teeth 14* and which crowns are generally constructed of metal such as gold and the like. The flange 11 may be of any de sired height but preferably extends only a short distance above the plate 10.

The cap 14: constructed of porcelain or any other suitable material is suitably shaped on its upper face and its lower face is reduced as at 15 to form a circumferential shoulder 16 so that when the cap is placed in position upon the plate 10 the reduced portion 15- will project inside of the flange 11 and the shoulder 16 will extend along and rest upon the top edge of the flange 11 so that the outer face of the flange will be substantially flush with the adjacent surface of the cap. The cap is secured in position in any suitable manner such as by means of cement, and when in position upon the plate, the plate will be substantially invisible from the top of the cap. By this arrangement it will be manifest that when the mouth is open and the cap or cusp is viewed from the top, the plate will be substantially invisible.

If desired and in order to provide an additional securing means for the cap upon a plate. the plate may be provided with an upwardly projecting rib 17 which extends transversely of the plate, within the flange, and preferably entirely across the plate although the length of the rib or projection 17 is immaterial. The porcelain cap 14 is provided with a recess 18 opening through its lower face and located within the redu ed portion 15 of the cap. This recess 18 is of a size and configuration to receive the rib or projection 17 and the interengaging securing means thus formed will assist in holding the porcelain cap or case in position. With this construction it will be manifest that the cap can be readily removed at any time with out necessitating the removal of the plate 10.

In bridge work the plate with the cap secured thereto is preferably supported or 119 spaced from the gum 19 so as to form an opening between the gum and the plate for sanitary reasons. The bottom of the plate 10 is preferably fiat so as to form no obstruction extending into the opening between the gum and plate.

Obviously many changes may be made in the details of construction and in the com bination and arrangement of the parts without departing from the spirit of this invention.

What is claimed as new is 1. The combination of a supporting plate, a peripheral flange projecting beyond the plate, and a porcelain cap removably connected with theplate, said cap having a reduced portion extending into the space within the flange whereby the outer surface of the flange will stand flush with the surface of the adjacent portion of the cap.

2. The combination of a supporting plate, a peripheral flange projecting beyond the plate, a porcelain cap removably connected with the plate, said cap having a reduced portion extending into the space within the flange whereby the outer surface of the flange will stand flush with the surface of the adjacent portion of the cap, and interengaging means between the plate and the said porcelain cap and within the said flange for assisting in holding the parts in proper position with relation to each other.

3. The combination of a supporting plate, a peripheral flange projecting beyond the plate, a porcelain cap removably connected with the plate, said cap having a reduced portion extending into the space within the flange whereby the outer surface of the flange will stand flush with the surface of the adjacent portion of the cap, and a rib projecting above the plate within the flange and extending in a direction across the plate, there being a recess in the face of the cap to receive the rib.

4:. A dental posterior bridge construction embodying a supporting plate spanning a cavity and anchored to adjacent teeth, said plate being spaced above the gum, a circumferential flange projecting above the plate, a porcelain cap element detachably secured to the plate, said cap element having a reduced portion to form a circumferential shoulder extending over and resting upon the top of the flange, the outer face of the flange being substantially flush with the adjacent portion of the said cap element, and a rib projecting above the plate and arranged within the flange, the said cap element having a recess to receive the rib.

In testimony whereof I have signed my name to this specification on this 11th day of July, A. D. 1919.

S. ALBERT SIGEL. 

